Method and means for filling tire casing cuts



R. M. BowEs Er Al. 1,904,403

METHOD AND MEANS FOR FILLING TIRE CASING CUTS April 18, 1933.

Filed Aug. 19, 1931 INvc/vroa,

,5J mm mi /l Horn @16.

Patented Apr. 18, 1933 V UNITEDv STATES I!'.`\',OIBEIEI".I.' M. BOWES .AND CHARLES E. BOWES, OIE' INDIANAPOLISyINDIANA METHOD AND MEANS FoarILLING TIRE cAsino curs A' Application mea .hc-'gust 19, 1931. serial No. 558,180.y

; veloped comprising unvulcanized "rubberl with vulcanizing agents added` thereto to` cause ther'ubber to 'cure 'out or vulcanize when exposed to air. Y f y This material, Y commercially known as tirel 22j! dough, was so elastiokthat it could not be,l

punched into the casingcuts, and Yeven when aball of it was fgo'rcedintoI a cut, itl did not: adhereto the` walls or sides rofthe/cut for the reason 'that it 'could' not*v be placed within the cut with sufficient pressure to completely lill the cords out of whichfthe ,fabric 'isf woven-and line the cavityl and then as the casing `was rolled over thepro'ad 4under the weight of the car, the ball of'tire dough Ain ,3Q the cavity would be shifted around from side. toside and finally protrude fromvthe cavity' to stick to the roadwayand be pulled out. Not only was it practicallyl impossibleto get any sizeable amount of the-tire dough into @1.5, the-cords 'of la out and keep'it there, but thel dough had to be 'in' `some `rcontainer fromy which it could be dug or cut outwhen wanted for use. u'In such containers, it was regularly exposed to the air and'itsoon becamecured f AQ anduseless and the manufacture of the tire' dough had heretofore'practically stopped. i

The tire doughis-the' same material as is found 'on the underside 'of thecommon tirel patch, only but' slightly more plastic. Its 545; elasticity is' 'great and' so is its 'toughness 'or tenacity inf resisting- 'being cut or pulled Our invention embodies the conception of and has for objects thesubjecting of the tire k dough to suliicie'nt pressurefto' causev it' to How and to interject the flowing tire dough under sutcient pressure to within the casing cut and, cavity thereunder to cause the i0w-' ing tire dough to spread out within the cut and press against the cords at the bottom and sides with considerable force so' as fto bring the 'tire dough into intimate Contact under yielding pressure-to cause the tire dough to become integrally unitedwith the cords upon vulcanizing thereto. When the tire dough is subjected to sufficientv pressureiit becomesy sticky or adhesive foverits contractingsur-V face so that it adheres tothe sides of the cut.y A. further object of the invention is to provide means for holding the tire dough heavy lubricants and other stiff, viscid liquids which are almost solids in shipment and for usei'inithe absence of air and for permitting the application lof pressure to the tire dough Without having to transfer it from one container to another or otherwise expose it to the air. o y e These and vother objects will become apparent-1in the followingde'scri'ption of .the invention with `rreference being made to the accompanying drawing, in which l Fig.`1 is a'fragmentary side elevationy of a gun Aembodying the invention; and Fig. 2, a fragmentary elevation of av tire dough filler cartridge.

"Like characters of reference indicate like parts in the two views'in the drawingL` We form a gun to have a barrel 10 with a smooth cylindrical internal bore and screwthreadedly enter a shaft 11 axially through a closed end of the barrel, the other end of which is open. The end of the shaft `11 within the barrel is conically shaped and the y outer end is turned to form a handle or crank by which the shaft may be revolved. f

A cap 12 is formed tol screwthreadedly.. engage thelower open end of the barrel 10 and has a short length of a bore therein las a e continuation of the bo-re ofthevbarrel. They lower end of thecap 12 is drawn out into a hollow tube or nozzle 13 of relatively small diameter which is in communication with the bore inthe cap. Y Y We form aller unit or cartridge 14, cylindrical in shape to have' an external dia1ne- 100 ter permitting it to be inserted Within the bore of the barrel and cap with a close sliding fit. A plug 15 is fitted within the cartridge and moved to one end thereof and prevented from slipping out by having the cartridge wall rolled inwardly somewhat. The outer side of the plug is provided with a conical seat 16 of substantially the same conformation as that of the inner end of the shaft 11. Against the plug 15 from the inner side is placed a Wad of felt 17 or other suitable material slightly compressible in nature.

Tire dough 18 or other material to be injected by the gun is placed within the cartridge from the open end and forced lightly against the wad and plug and a friction re? tained cap 19 is pushed into the open end to cover over the tire dough and seal it from the air. These cartridges 14 containing the desired material are supplied the user who removes the cap 19 and places the open end of the `cartridge into the cap 12 and inserts the other end in the bore of the barrel 10. The cap 12 is then screwed onto the barrel 10 and the shaft 11 is revolved to bring its pointed end down into the seat 16 of the plug 15. f

The pitch of the threads on the shaft 11 is very small so that by continuing to revolve l the shaft, the plug 15 is moved down against the solid tire dough in the cartridge to apply considerable pressure thereto. In fact, the pressure becomes so great that the tire dough is caused to flow from the open cartridge end through the ycap nozzle 18 to exude therefrom in a solid stream. The nozzle 18 is forced into a cut of the casing (not shown) and worked around therein to spread the AWalls of the cut While the tire dough is flowing from its end to have the entire cavity Within the cut filled and expanded by the eX- truding tire dough entered therein under pressure. The tire do-ugh thus coming into contact under pressure with the rubber of the sides of the cut adheres thereto and soon stickiness of the exposed surface,

When the contents of the cartridge 14 has been forced out of it, the cap 12 may be unscrewed and the empty cartridge Withdrawn and thrown away. The use of the cartridge has kept the contents from coming into contact with the bore of the barrel 10 and also that of the cap 12, and a clean bore is presented to receive the next cartridge. The conical point on the shaft end seats in the plug 15'so as to carry it through the cartridge without its turning or cooking therewithin, and should the gun be attempted to be used for other purposes by filling the bore of the barrel directly, the pointed end of the shaft Would be ineffective in forcing out substances therefrom, so that use of the cartridge isV enforced and a clean bore is. preserved thereby. Since the cartridge has its upper end within the barrel and its open or discharging end within the cap, a length of the cartridge always extends from'either the cap or the barrel when the cap is removed so that the cartridge maybe grasped and pulled out from either member as the case may be.

While We have here described and shown our invention in the formas now best known to us, it is obvious that structural changes may be made inthe gun and the filler cartridge and its contents without departing from the spirit of the invention-and, We therefore do not desireto be limited to that precise form beyondthe limitations of the accompanying claims. K

We claim:

1. A gun cylinder'closed `at one end having a threaded hole through the closed end, an extension at the other end removably secured to and having substantially the same bore as the cylinder and terminating With a reduced nozzle, a cartridge seated in the bore of the cylinderand far enough in the cylinder extension to provide a hand hold for the Withdrawal of. the cartridge shell when the extension Vis removed, a plug in the bore ofthe cartridge-initially in the end opposite the hand hold portion, said4 plug having a countersunk outer side, means to prevent the passing of the plug through said end oppositethe hand hold portionand a threaded shaft screwed through the threaded hole in the end of the gun cylinder said shaft having` a formed end which enters the countersink in the plug.

2. A gun cylinder closed at one end having a threaded hole through the closed end, a removable extension at'. the other end secured to the cylinder and terminating withV shaft having an end which is seated in the conntersink in the plug.

' 3. A. gun cylinder closed at one end having athreaded hole through the closed end, a 130 removable extension at the other` end secured to the cylinder and terminating with a discharge nozzle, sa-id end having a cartridge holding socket, a cartridge having an open lower end seated in the socket and inserted in the cylinder by its upper end with aV sliding fit through the open end of the cylinder, said cartridge adapted to contain a Viseid material, a plugin the bore of the cartridge initially in the top end thereof,v

said top end of the cartridgebeing reduced so the plug cannot pass therethrough, a Wad of compressible material contacting the inner face of the plug, and a threaded shaft screwed through the threaded hole in the end of the gun cylinder against the plug.

In testimony whereof we aix our signatures.

ROBERT M. BOWES. CHARLES E. BOWES. 

